Composition of matter especially adapted for use in manufacturing building-blocks.



NI'IED STATES P TENT OFFICE.

LEOPOLD GLEICHMAR, OF RUDOLSTADT, GERMANY.

COMPOSITION OF MATTER ESPECIALLY ADAPTED FOR USE IN MANUFACTURING BUILDING-BLOCKS.

SIEC'IFICATION forming part of Letters Patent No.644,765, dated March 6, 1900.

Application filed January 2, 1900. Serial No. 135. (N0 specimens.)

marble to bring the mixture to the consistency of a thin paste. Themixture is then boiled for six hours and cooled or allowed to cool. When the mixture has cooled, I stir in pulverized marble and sand of equal parts until the mass has assumed the form of a loose powder. This powder may be pressed in suitable forms into building-blocks. I employ castor-oil for thepurpose of giving the blocksgreat toughness, so as to prevent the corners and edges of the blocks from breaking off easily and to neutralize the dis agreeable odor that results when linseed-oil aloneis used. Linseed-oil and castor-oil pro duce, with the marble-dust, a putty-like sub stance. The marble-dust is employed for the purpose of giving the stones a soft appearance. The stones may also be polished, which polish is increased by the addition of rosin.

Having described my invention, what I claim, and desire to secure by Letters Patent,

.A composition of matter suitable for the manufacture of building-blocks consisting of linseed-oil, castor-oil, rosin and a thickening ingredient of a granular or sandy character, as specified.

LEOPOLD GLEICHMAR.

Witnesses:

' CARL PETZULER,

v RUDOLPH FRIoKn. 

